Hydromechanical drilling device

Details Hydromechanical drilling device Hydromechanical drilling device

1977-06-20

1978-08-15

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 67, 175393, E21C 1500

Patent

active

041065778

ABSTRACT:
A hydromechanical drilling tool which combines a high pressure water jet drill with a conventional roller cone type of drilling bit. The high pressure jet serves as a tap drill for cutting a relatively small diameter hole in advance of the conventional bit. Auxiliary laterally projecting jets also serve to partially cut rock and to remove debris from in front of the bit teeth thereby reducing significantly the thrust loading for driving the bit.

REFERENCES:
patent: 2218130 (1940-10-01), Court
patent: 2755071 (1956-07-01), Kammerer, Jr.
patent: 2785875 (1957-03-01), Hayes
patent: 2963102 (1960-12-01), Smith
patent: 3016099 (1962-01-01), Woodruff
patent: 3070182 (1962-12-01), Runte
patent: 3081828 (1963-03-01), Quick
patent: 3455515 (1969-07-01), Connolly
patent: 3865202 (1975-02-01), Takahashi et al.
Novel Drilling Techniques, W. C. Maurer, Pergamon Press NY, Mar. 1968, pp. 39-44.

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